diff options
Diffstat (limited to 'include/asm-um/pgtable.h')
| -rw-r--r-- | include/asm-um/pgtable.h | 238 |
1 files changed, 92 insertions, 146 deletions
diff --git a/include/asm-um/pgtable.h b/include/asm-um/pgtable.h index a747f7dd4ff4..7f980a262334 100644 --- a/include/asm-um/pgtable.h +++ b/include/asm-um/pgtable.h @@ -1,5 +1,6 @@ /* * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright 2003 PathScale, Inc. * Derived from include/asm-i386/pgtable.h * Licensed under the GPL */ @@ -7,13 +8,29 @@ #ifndef __UM_PGTABLE_H #define __UM_PGTABLE_H -#include <asm-generic/4level-fixup.h> - #include "linux/sched.h" #include "asm/processor.h" #include "asm/page.h" #include "asm/fixmap.h" +#define _PAGE_PRESENT 0x001 +#define _PAGE_NEWPAGE 0x002 +#define _PAGE_NEWPROT 0x004 +#define _PAGE_FILE 0x008 /* set:pagecache unset:swap */ +#define _PAGE_PROTNONE 0x010 /* If not present */ +#define _PAGE_RW 0x020 +#define _PAGE_USER 0x040 +#define _PAGE_ACCESSED 0x080 +#define _PAGE_DIRTY 0x100 + +#ifdef CONFIG_3_LEVEL_PGTABLES +#include "asm/pgtable-3level.h" +#else +#include "asm/pgtable-2level.h" +#endif + +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; + extern void *um_virt_to_phys(struct task_struct *task, unsigned long virt, pte_t *pte_out); @@ -22,35 +39,6 @@ extern unsigned long *empty_zero_page; #define pgtable_cache_init() do ; while (0) -/* PMD_SHIFT determines the size of the area a second-level page table can map */ -#define PMD_SHIFT 22 -#define PMD_SIZE (1UL << PMD_SHIFT) -#define PMD_MASK (~(PMD_SIZE-1)) - -/* PGDIR_SHIFT determines what a third-level page table entry can map */ -#define PGDIR_SHIFT 22 -#define PGDIR_SIZE (1UL << PGDIR_SHIFT) -#define PGDIR_MASK (~(PGDIR_SIZE-1)) - -/* - * entries per page directory level: the i386 is two-level, so - * we don't really have any PMD directory physically. - */ -#define PTRS_PER_PTE 1024 -#define PTRS_PER_PMD 1 -#define PTRS_PER_PGD 1024 -#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE) -#define FIRST_USER_PGD_NR 0 - -#define pte_ERROR(e) \ - printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) -#define pmd_ERROR(e) \ - printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) -#define pgd_ERROR(e) \ - printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) - -extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; - /* * pgd entries used up by user/kernel: */ @@ -70,7 +58,7 @@ extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; extern unsigned long end_iomem; #define VMALLOC_OFFSET (__va_space) -#define VMALLOC_START ((end_iomem + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)) +#define VMALLOC_START ((end_iomem + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)) #ifdef CONFIG_HIGHMEM # define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE) @@ -78,18 +66,8 @@ extern unsigned long end_iomem; # define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE) #endif -#define _PAGE_PRESENT 0x001 -#define _PAGE_NEWPAGE 0x002 -#define _PAGE_NEWPROT 0x004 -#define _PAGE_FILE 0x008 /* set:pagecache unset:swap */ -#define _PAGE_PROTNONE 0x010 /* If not present */ -#define _PAGE_RW 0x020 -#define _PAGE_USER 0x040 -#define _PAGE_ACCESSED 0x080 -#define _PAGE_DIRTY 0x100 - -#define REGION_MASK 0xf0000000 -#define REGION_SHIFT 28 +#define REGION_SHIFT (sizeof(pte_t) * 8 - 4) +#define REGION_MASK (((unsigned long) 0xf) << REGION_SHIFT) #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY) #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY) @@ -157,16 +135,13 @@ extern pte_t * __bad_pagetable(void); /* sizeof(void*)==1<<SIZEOF_PTR_LOG2 */ /* 64-bit machines, beware! SRB. */ -#define SIZEOF_PTR_LOG2 2 +#define SIZEOF_PTR_LOG2 3 /* to find an entry in a page-table */ #define PAGE_PTR(address) \ ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK) -#define pte_none(x) !(pte_val(x) & ~_PAGE_NEWPAGE) -#define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE)) - -#define pte_clear(xp) do { pte_val(*(xp)) = _PAGE_NEWPAGE; } while (0) +#define pte_clear(xp) pte_set_val(*(xp), (phys_t) 0, __pgprot(_PAGE_NEWPAGE)) #define pmd_none(x) (!(pmd_val(x) & ~_PAGE_NEWPAGE)) #define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE) @@ -176,67 +151,22 @@ extern pte_t * __bad_pagetable(void); #define pmd_newpage(x) (pmd_val(x) & _PAGE_NEWPAGE) #define pmd_mkuptodate(x) (pmd_val(x) &= ~_PAGE_NEWPAGE) -/* - * The "pgd_xxx()" functions here are trivial for a folded two-level - * setup: the pgd is never bad, and a pmd always exists (as it's folded - * into the pgd entry) - */ -static inline int pgd_none(pgd_t pgd) { return 0; } -static inline int pgd_bad(pgd_t pgd) { return 0; } -static inline int pgd_present(pgd_t pgd) { return 1; } -static inline void pgd_clear(pgd_t * pgdp) { } - - -#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) +#define pud_newpage(x) (pud_val(x) & _PAGE_NEWPAGE) +#define pud_mkuptodate(x) (pud_val(x) &= ~_PAGE_NEWPAGE) -#define pte_page(pte) phys_to_page(pte_val(pte)) -#define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK) - -#define pte_pfn(x) phys_to_pfn(pte_val(x)) -#define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot)) - -extern struct page *phys_to_page(const unsigned long phys); -extern struct page *__virt_to_page(const unsigned long virt); -#define virt_to_page(addr) __virt_to_page((const unsigned long) addr) - -/* - * Bits 0 through 3 are taken - */ -#define PTE_FILE_MAX_BITS 28 - -#define pte_to_pgoff(pte) ((pte).pte_low >> 4) - -#define pgoff_to_pte(off) \ - ((pte_t) { ((off) << 4) + _PAGE_FILE }) - -static inline pte_t pte_mknewprot(pte_t pte) +static inline pud_t *__pud_alloc(struct mm_struct *mm, pgd_t *pgd, + unsigned long addr) { - pte_val(pte) |= _PAGE_NEWPROT; - return(pte); + BUG(); } -static inline pte_t pte_mknewpage(pte_t pte) -{ - pte_val(pte) |= _PAGE_NEWPAGE; - return(pte); -} +#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) -static inline void set_pte(pte_t *pteptr, pte_t pteval) -{ - /* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so - * fix_range knows to unmap it. _PAGE_NEWPROT is specific to - * mapped pages. - */ - *pteptr = pte_mknewpage(pteval); - if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr); -} +#define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK) -/* - * (pmds are folded into pgds so this doesn't get actually called, - * but the define is needed for a generic inline function.) - */ -#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval) -#define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval) +#define pte_address(x) (__va(pte_val(x) & PAGE_MASK)) +#define mk_phys(a, r) ((a) + (((unsigned long) r) << REGION_SHIFT)) +#define phys_addr(p) ((p) & ~REGION_MASK) /* * The following only work if pte_present() is true. @@ -244,25 +174,25 @@ static inline void set_pte(pte_t *pteptr, pte_t pteval) */ static inline int pte_user(pte_t pte) { - return((pte_val(pte) & _PAGE_USER) && - !(pte_val(pte) & _PAGE_PROTNONE)); + return((pte_get_bits(pte, _PAGE_USER)) && + !(pte_get_bits(pte, _PAGE_PROTNONE))); } static inline int pte_read(pte_t pte) { - return((pte_val(pte) & _PAGE_USER) && - !(pte_val(pte) & _PAGE_PROTNONE)); + return((pte_get_bits(pte, _PAGE_USER)) && + !(pte_get_bits(pte, _PAGE_PROTNONE))); } static inline int pte_exec(pte_t pte){ - return((pte_val(pte) & _PAGE_USER) && - !(pte_val(pte) & _PAGE_PROTNONE)); + return((pte_get_bits(pte, _PAGE_USER)) && + !(pte_get_bits(pte, _PAGE_PROTNONE))); } static inline int pte_write(pte_t pte) { - return((pte_val(pte) & _PAGE_RW) && - !(pte_val(pte) & _PAGE_PROTNONE)); + return((pte_get_bits(pte, _PAGE_RW)) && + !(pte_get_bits(pte, _PAGE_PROTNONE))); } /* @@ -270,85 +200,98 @@ static inline int pte_write(pte_t pte) */ static inline int pte_file(pte_t pte) { - return (pte).pte_low & _PAGE_FILE; + return pte_get_bits(pte, _PAGE_FILE); +} + +static inline int pte_dirty(pte_t pte) +{ + return pte_get_bits(pte, _PAGE_DIRTY); +} + +static inline int pte_young(pte_t pte) +{ + return pte_get_bits(pte, _PAGE_ACCESSED); +} + +static inline int pte_newpage(pte_t pte) +{ + return pte_get_bits(pte, _PAGE_NEWPAGE); } -static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } -static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } -static inline int pte_newpage(pte_t pte) { return pte_val(pte) & _PAGE_NEWPAGE; } static inline int pte_newprot(pte_t pte) { - return(pte_present(pte) && (pte_val(pte) & _PAGE_NEWPROT)); + return(pte_present(pte) && (pte_get_bits(pte, _PAGE_NEWPROT))); } static inline pte_t pte_rdprotect(pte_t pte) { - pte_val(pte) &= ~_PAGE_USER; + pte_clear_bits(pte, _PAGE_USER); return(pte_mknewprot(pte)); } static inline pte_t pte_exprotect(pte_t pte) { - pte_val(pte) &= ~_PAGE_USER; + pte_clear_bits(pte, _PAGE_USER); return(pte_mknewprot(pte)); } static inline pte_t pte_mkclean(pte_t pte) { - pte_val(pte) &= ~_PAGE_DIRTY; + pte_clear_bits(pte, _PAGE_DIRTY); return(pte); } static inline pte_t pte_mkold(pte_t pte) { - pte_val(pte) &= ~_PAGE_ACCESSED; + pte_clear_bits(pte, _PAGE_ACCESSED); return(pte); } static inline pte_t pte_wrprotect(pte_t pte) { - pte_val(pte) &= ~_PAGE_RW; + pte_clear_bits(pte, _PAGE_RW); return(pte_mknewprot(pte)); } static inline pte_t pte_mkread(pte_t pte) { - pte_val(pte) |= _PAGE_USER; + pte_set_bits(pte, _PAGE_RW); return(pte_mknewprot(pte)); } static inline pte_t pte_mkexec(pte_t pte) { - pte_val(pte) |= _PAGE_USER; + pte_set_bits(pte, _PAGE_USER); return(pte_mknewprot(pte)); } static inline pte_t pte_mkdirty(pte_t pte) { - pte_val(pte) |= _PAGE_DIRTY; + pte_set_bits(pte, _PAGE_DIRTY); return(pte); } static inline pte_t pte_mkyoung(pte_t pte) { - pte_val(pte) |= _PAGE_ACCESSED; + pte_set_bits(pte, _PAGE_ACCESSED); return(pte); } static inline pte_t pte_mkwrite(pte_t pte) { - pte_val(pte) |= _PAGE_RW; + pte_set_bits(pte, _PAGE_RW); return(pte_mknewprot(pte)); } static inline pte_t pte_mkuptodate(pte_t pte) { - pte_val(pte) &= ~_PAGE_NEWPAGE; - if(pte_present(pte)) pte_val(pte) &= ~_PAGE_NEWPROT; + pte_clear_bits(pte, _PAGE_NEWPAGE); + if(pte_present(pte)) + pte_clear_bits(pte, _PAGE_NEWPROT); return(pte); } -extern unsigned long page_to_phys(struct page *page); +extern phys_t page_to_phys(struct page *page); /* * Conversion functions: convert a page and protection to a page entry, @@ -357,11 +300,9 @@ extern unsigned long page_to_phys(struct page *page); extern pte_t mk_pte(struct page *page, pgprot_t pgprot); -#define pte_set_val(p, phys, prot) pte_val(p) = (phys | pgprot_val(prot)) - static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) { - pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); + pte_set_val(pte, (pte_val(pte) & _PAGE_CHG_MASK), newprot); if(pte_present(pte)) pte = pte_mknewpage(pte_mknewprot(pte)); return pte; } @@ -374,15 +315,15 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) * this macro returns the index of the entry in the pgd page which would * control the given virtual address */ -#define pgd_index(address) ((address >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) +#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) + +#define pgd_index_k(addr) pgd_index(addr) /* * pgd_offset() returns a (pgd_t *) * pgd_index() is used get the offset into the pgd page's array of pgd_t's; */ -#define pgd_offset(mm, address) \ -((mm)->pgd + ((address) >> PGDIR_SHIFT)) - +#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address)) /* * a shortcut which implies the use of the kernel's pgd, instead @@ -390,14 +331,13 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) */ #define pgd_offset_k(address) pgd_offset(&init_mm, address) -#define pmd_index(address) \ - (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) - -/* Find an entry in the second-level page table.. */ -static inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address) -{ - return (pmd_t *) dir; -} +/* + * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] + * + * this macro returns the index of the entry in the pmd page which would + * control the given virtual address + */ +#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) /* * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] @@ -430,9 +370,15 @@ static inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address) #include <asm-generic/pgtable.h> -#endif +#include <asm-generic/pgtable-nopud.h> #endif +#endif + +extern struct page *phys_to_page(const unsigned long phys); +extern struct page *__virt_to_page(const unsigned long virt); +#define virt_to_page(addr) __virt_to_page((const unsigned long) addr) + /* * Overrides for Emacs so that we follow Linus's tabbing style. * Emacs will notice this stuff at the end of the file and automatically |